package org.apache.maven.settings.io;

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.Reader;
import java.util.Map;

import org.apache.maven.settings.Settings;
import org.apache.maven.settings.io.xpp3.SettingsXpp3Reader;
import org.codehaus.plexus.component.annotations.Component;
import org.codehaus.plexus.util.IOUtil;
import org.codehaus.plexus.util.ReaderFactory;
import org.codehaus.plexus.util.xml.pull.XmlPullParserException;

/**
 * Handles deserialization of settings from the default textual format.
 * 
 * @author Benjamin Bentmann
 */
@Component(role = SettingsReader.class)
public class DefaultSettingsReader implements SettingsReader {

  public Settings read(File input, Map<String, ?> options) throws IOException {
    if (input == null) {
      throw new IllegalArgumentException("input file missing");
    }

    Settings settings = read(ReaderFactory.newXmlReader(input), options);

    return settings;
  }

  public Settings read(Reader input, Map<String, ?> options) throws IOException {
    if (input == null) {
      throw new IllegalArgumentException("input reader missing");
    }

    try {
      SettingsXpp3Reader r = new SettingsXpp3Reader();
      return r.read(input, isStrict(options));
    } catch (XmlPullParserException e) {
      throw new SettingsParseException(e.getMessage(), e.getLineNumber(), e.getColumnNumber(), e);
    } finally {
      IOUtil.close(input);
    }
  }

  public Settings read(InputStream input, Map<String, ?> options) throws IOException {
    if (input == null) {
      throw new IllegalArgumentException("input stream missing");
    }

    try {
      SettingsXpp3Reader r = new SettingsXpp3Reader();
      return r.read(input, isStrict(options));
    } catch (XmlPullParserException e) {
      throw new SettingsParseException(e.getMessage(), e.getLineNumber(), e.getColumnNumber(), e);
    } finally {
      IOUtil.close(input);
    }
  }

  private boolean isStrict(Map<String, ?> options) {
    Object value = (options != null) ? options.get(IS_STRICT) : null;
    return value == null || Boolean.parseBoolean(value.toString());
  }

}
